Cartridge holder



FIG. 1 is a front perspective view of a cartridge holder showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is an exploded perspective view thereof showing the cartridge holder in its open position;

FIG. 4 is a side elevational view thereof in a closed position.

The undisclosed bottom is substantially flat and unornamented. 

The ornamental design for a cartridge holder, as shown and described. 